Rapid and sensitive detection of malachite green in aquaculture water by electrochemical preconcentration and surface-enhanced Raman scattering

A highly sensitive and rapid method of in-situ surface-enhanced Raman spectroscopy (SERS) combining with electrochemical preconcentration (EP) in detecting malachite green (MG) in aquaculture water was established. Ag nanoparticles (AgNPs) were synthesized and spread onto the surface of gold electro...

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Bibliographic Details
Published in:Talanta (Oxford) 2018-04, Vol.180, p.383-388
Main Authors: Xu, Kai-Xuan, Guo, Mei-Hong, Huang, Yu-Ping, Li, Xiao-Dong, Sun, Jian-Jun
Format: Article
Language:English
Subjects:
Aquaculture
Aquaculture water
Coloring Agents - analysis
Coloring Agents - isolation & purification
Electrochemical preconcentration (EP)
Electrochemical Techniques - instrumentation
Electrochemical Techniques - methods
Equipment Design
Limit of Detection
Malachite green
Metal Nanoparticles - chemistry
Metal Nanoparticles - ultrastructure
Rosaniline Dyes - analysis
Rosaniline Dyes - isolation & purification
Silver - chemistry
Spectrum Analysis, Raman - instrumentation
Spectrum Analysis, Raman - methods
Surface-enhanced Raman spectroscopy (SERS)
Water - analysis
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - isolation & purification
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Summary:A highly sensitive and rapid method of in-situ surface-enhanced Raman spectroscopy (SERS) combining with electrochemical preconcentration (EP) in detecting malachite green (MG) in aquaculture water was established. Ag nanoparticles (AgNPs) were synthesized and spread onto the surface of gold electrodes after centrifuging to produce SERS-active substrates. After optimizing the pH values, preconcentration potentials and times, in-situ EP-SERS detection was carried out. A sensitive and rapid analysis of the low-concentration MG was accomplished within 200s and the limit of detection was 2.4 × 10−16M. [Display omitted] •The method of in-situ SERS-EP in detecting MG was established firstly.•The SERS substrate is fast, simple to be prepared as well as at low cost.•The EP-SERS for MG detection has higher detection limit compared to earlier methods.•The whole EP-SERS process was timesaving and efficient.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2017.12.079